.wrap{
    width: 100%;
    height: 400px;
    position: relative;
    padding-top: 60px;
}
.list{
    width: 100%;
    height: 400px;
    list-style: none;
    position: relative;
    padding-left:0;
}
.item{
    width: 100%;
    height: 100%;
    font-size: 50px;
    color: white;
    position: absolute;
    opacity: 0;
    transition: all 1s;
}
.item:nth-child(1){
    background-image: url(../../images/nav3.png);
    background-repeat: repeat-x;
}
.item:nth-child(2){
    background-image: url(../../images/nav2.png);
    background-repeat: repeat-x;
}
.item:nth-child(3){
    background-image: url(../../images/nav4.png);
    background-repeat: repeat-x;
}
.btn{
    position: absolute;
    top: 220px;
    z-index: 1000;
    background-color: rgba(0,0,0,0.1);
    color: white;
    border: 0 solid #e7e7e7;
    font-size: 50px;
}
#goPre{
    left: 0;
}
#goNext{
    right: 0;
}
.item.active{
    opacity: 1;
    z-index: 10;
}
.pointlist{
    padding-left: 0;
    list-style: none;
    position: absolute;
    left: 50%;
    transform: translate(-50% ,-50%);
    bottom: 10px;
    z-index: 1000;
}
.point{
    width: 10px;
    height: 10px;
    background-color: rgba(255,255,255,0.4);
    border-radius: 100%;
    float: left;
    margin-right:14px ;
    z-index: 1000;
}
.point.active{
    background-color: rgba(255,255,255,0.8);
}